Installation method of bridge expansion device

Abstract

The present invention discloses an installation method for a bridge expansion device, in which the pressing edge of a water stop strip is pressed into a pressing groove of a profile by a pressure strip, and then the pressure strip and the profile are riveted together by rivets. The structure is stable, the installation is convenient, and the number of maintenance times can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to an installation method of a bridge expansion device. Background Art

[0002] The expansion device of a bridge is mainly a water stop, and its main function is to prevent rainwater and other water from flowing from the end of the bridge deck into the bottom of the bridge deck, so as to avoid corrosion and damage to the bridge's ancillary facilities.

[0003] The waterstop strips in existing bridge expansion devices need to be connected to the profiles by bolts or screws. The installation method is complicated, the bolts are easy to loosen, and frequent maintenance is required. Summary of the Invention

[0004] The object of the present invention is to provide an installation method for a bridge expansion device which is easy to install and can reduce maintenance.

[0005] The technical solution of the present invention provides a method for installing a bridge expansion device, which includes anchoring steel bars, a profile with a pressure groove, a water stop strip with pressure edges on both sides, and a pressure strip for pressing the pressure edges into the pressure groove; wherein the profile has a cavity, the bottom plate of the pressure groove has a bottom plate mounting hole communicating with the cavity, and the pressure strip has a pressure strip mounting hole;

[0006] The steps include:

[0007] S01: pre-connecting the anchor steel bar and the profile into a pre-assembled assembly;

[0008] S02: Fixing a set of pre-assembled components at the ends of two spaced-apart beam sections, respectively, wherein the anchoring steel bars in each set of the pre-assembled components are fixed to the beam section, and the profiles in each set of the pre-assembled components are close to the beam gap between the two beam sections;

[0009] S03: Using a protective device to cover the notch of the trough, and pouring concrete to a preset height;

[0010] S04: After the concrete solidifies to a preset degree, the protective device is removed and the notch of the groove is opened;

[0011] S05: inserting the pressing edges on both sides of the water stop strip into the pressing grooves of the profiles on both sides respectively;

[0012] S06: Pressing the pressure strip into the pressure groove, aligning the pressure strip mounting hole with the base plate mounting hole, and pressing the pressure edge against the groove wall of the pressure groove by the pressure strip;

[0013] S07: inserting rivets from the molding installation hole into the base plate installation hole and the cavity, and using a riveting tool to rivet the molding and the profile together.

[0014] In one of the optional technical solutions, before step S01, a first supporting steel bar perpendicular to the top surface of the beam body is pre-installed at the end of the beam body;

[0015] The step S02 includes: tying the anchor steel bar to the first supporting steel bar;

[0016] The step S03 includes: pouring concrete higher than the top surface of the beam;

[0017] The step S04 includes: forming a water retaining platform after the concrete solidifies.

[0018] In one of the optional technical solutions, before step S01, mounting grooves are respectively opened at the ends of the two sections of the beam, and supporting bottom plates are respectively embedded in the mounting grooves of the two sections of the beam.

[0019] The step S02 further includes: welding second supporting steel bars perpendicular to the top surface of the beam body on the supporting bottom plates embedded in the two sections of the beam body, respectively; and welding a positioning tube perpendicular to the top surface of the beam body on the supporting bottom plates embedded in one section of the beam body;

[0020] tying the anchor steel bar to the second supporting steel bar;

[0021] Inserting the first end of the L-shaped connecting steel plate into the positioning tube, and making the second end of the connecting steel plate higher than the top surface of the beam body and extending toward the beam gap between the two sections of the beam body;

[0022] The step S03 further includes: pouring concrete into the installation grooves of the two sections of the beam body;

[0023] It also includes step S08: welding one end of the ballast retaining cover plate to the second end of the connecting steel plate, and the two ends of the ballast retaining cover plate are respectively covered on the concrete poured in the installation grooves on both sides, and the ballast retaining cover plate is flush with the top surface of the beam body.

[0024] In one of the optional technical solutions, when installing the connecting steel plate, a waterproof material is used to seal the gap between the connecting steel plate and the positioning tube.

[0025] In one of the optional technical solutions, the anchoring steel bar includes a steel bar connecting end having an external thread, and a locking nut is connected to the steel bar connecting end;

[0026] The profile has a nut mounting hole opening toward the steel bar connection end, the nut mounting hole has a radially extending limiting groove, a connecting nut is mounted in the nut mounting hole, the connecting nut includes a nut protrusion, and the nut protrusion is embedded in the limiting groove;

[0027] Connect the steel bar connection end to the connection nut and tighten the lock nut.

[0028] In one of the optional technical solutions, the pressing groove has an inner groove wall and an outer groove wall arranged opposite to each other, the inner groove wall is located close to the water stop strip, and the inner groove wall extends inwardly and upwardly;

[0029] A receiving groove is further provided in the profile below the pressing groove and communicates with the pressing groove, and the receiving groove extends vertically downward from the inner groove wall side;

[0030] The edge pressing portion includes an edge pressing body portion extending outward and downward in an oblique manner and an edge pressing extension portion extending vertically downward from an end portion of the edge pressing body portion;

[0031] The edge pressing extension portion is inserted into the receiving groove, and the edge pressing body portion is pressed against the inner groove wall by the pressing strip.

[0032] In one of the optional technical solutions, when installing the bead, sealing strips are respectively installed between the bead and the pressing edge and between the bead and the outer groove wall.

[0033] In one of the optional technical solutions, when installing the water stop strip, two adjacent sections of the water stop strip are clamped in advance by fixing clamps, and the water stop strip is temporarily fixed in the beam gap between the two sections of the beam body;

[0034] After cleaning the pressing groove, the fixing clamps are gradually disassembled and the pressing edge of the water stop strip is inserted into the pressing groove.

[0035] In one of the optional technical solutions, when installing the profile, a polytetrafluoroethylene sealing gasket is installed between two adjacent sections of the profile.

[0036] In one of the optional technical solutions, after the concrete solidifies to a preset degree, a waterproof coating is applied to the profile and the concrete respectively.

[0037] The above technical solution has the following beneficial effects:

[0038] The installation method of the bridge expansion device provided by the present invention presses the pressing edge of the water stop strip into the pressing groove of the profile through the pressure strip, and then rivets the pressure strip and the profile through rivets. The structure is stable, the installation is convenient, and the maintenance times can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the spacing arrangement of two beam sections;

[0040] Figure 2 Schematic diagram of the pre-assembled assembly consisting of profiles and anchor bars installed at the ends of two beam sections;

[0041] Figure 3 Schematic diagram of the assembled profiles and anchor bars placed on the beam;

[0042] Figure 4 This is a schematic diagram for installing waterstop strips;

[0043] Figure 5 Schematic diagram of the cooperation between the fixing clip and the water stop strip;

[0044] Figure 6 This is a schematic diagram of the pressing strip and the sealing strip being pressed downward into the pressing groove;

[0045] Figure 7 A top view of the water stop;

[0046] Figure 8 for Figure 7 Cross-sectional view along AA direction;

[0047] Figure 9 is a top view of the profile;

[0048] Figure 10 Figure 9 Cross-sectional view along BB direction;

[0049] Figure 11 It is a top view of the layering;

[0050] Figure 12 for Figure 11 Cross-sectional view along CC direction;

[0051] Figure 13 This is a schematic diagram before rivet riveting;

[0052] Figure 14 This is a schematic diagram of the rivet after riveting;

[0053] Figure 15 It is a cross-sectional view of the connection between the anchor steel bar and the profile;

[0054] Figure 16 Elevation drawing of the installation of bridge expansion devices for ballastless track;

[0055] Figure 17 A top view of the installation of the bridge expansion device for ballastless track;

[0056] Figure 18Elevation drawing of the installation of bridge expansion devices for ballasted track;

[0057] Figure 19 Top view of the installation of the expansion joint for a ballasted track bridge. DETAILED DESCRIPTION

[0058] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0059] like Figure 1-4 and Figure 6-17 As shown, an embodiment of the present invention provides a method for installing a bridge expansion device, which includes an anchoring steel bar 1, a profile 2 having a pressure groove 21, a water stop 3 having pressure edges 31 on both sides, and a pressure strip 4 for pressing the pressure edges 31 into the pressure groove 21. The profile 2 has a cavity 22, the bottom plate 213 of the pressure groove 21 has a bottom plate mounting hole 214 that communicates with the cavity 22, and the pressure strip 4 has a pressure strip mounting hole 41.

[0060] The installation method of the bridge expansion device includes the following steps:

[0061] S01: Pre-connect the anchor steel bar 1 and the profile 2 to form a pre-assembled component.

[0062] S02: A set of pre-assembled components is fixed at the ends of two spaced-apart beam bodies 100 respectively, wherein the anchoring steel bars 1 in each set of pre-assembled components are fixed on the beam body 100, and the profiles 2 in each set of pre-assembled components are close to the beam seam 200 between the two beam body sections 100.

[0063] S03: Use a protective device to cover the notch of the pressing groove 21 and pour concrete to a preset height.

[0064] S04: After the concrete solidifies to a preset degree, the protective device is removed and the notch of the pressing groove 21 is opened.

[0065] S05: inserting the pressing edges 31 on both sides of the water stop strip 3 into the pressing grooves 21 of the profiles 2 on both sides respectively.

[0066] S06 : Press the pressing strip 4 into the pressing groove 21 , and align the pressing strip mounting hole 41 with the bottom plate mounting hole 214 , and press the pressing edge 31 and the groove wall of the pressing groove 21 tightly through the pressing strip 4 .

[0067] S07: insert the rivet 7 from the bead mounting hole 41 into the base plate mounting hole 214 and the cavity, and use a riveting tool to rivet the bead 4 and the profile 2 together with the rivet 7.

[0068] The installation method of the bridge expansion device provided by the present invention is mainly used for installing the bridge expansion device during railway bridge construction.

[0069] The bridge expansion device includes an anchor bar 1, a profile 2, a waterstop 3, and a pressure strip 4. The anchor bar 1 is fixed to the beam 100. The profile 2 has a pressure groove 21 on one side, which also contains a cavity 22. The bottom plate 213 of the pressure groove 21 has a bottom plate mounting hole 214 that connects to the cavity 22. The main body of the waterstop 3 is U-shaped, with pressure edges 31 on both sides. The pressure strip 4 has a pressure strip mounting hole 41.

[0070] When constructing the beam body 100 , the head ends of the two sections of the beam body 100 are spaced apart from each other, and a beam gap 200 is formed between the two sections of the beam body 100 . The water stop strip 3 is used to be installed in the beam gap 200 to achieve the expansion and contraction function and the water stop function.

[0071] Preparation before installation: clean the installation area of ​​the beam body 100, and pre-connect the anchor steel bars 1 and the profiles 2 into a pre-assembled assembly.

[0072] Install pre-assembled components: A set of pre-assembled components is installed at the end of each bridge section 100. The anchor bars 1 in the pre-assembled components are temporarily fixed to the bridge body 100 or the supporting bars on the bridge body, and the profiles 2 in the pre-assembled components face the beam joint 200 between the two bridge sections 100.

[0073] Concrete pouring to secure the preassembled assembly: First, a protective device (such as a baffle) is used to shield the notch of the pressure groove 21. Concrete is then poured into the installation area of ​​the bridge body 100 to a predetermined height, covering the anchor bars 1 and the profile 2. After the concrete has solidified to a predetermined level, for example, reaching over 80% of its design strength, the protective device is removed, and the notch of the pressure groove 21 is opened. The pressure groove 21 of the profile 2 is oriented upward, facing the beam joint 200. The protective device protects the notch from being covered by concrete.

[0074] Install the water stop strip 3: insert the pressing edges 31 on both sides of the water stop strip 3 into the pressing grooves 21 of the profiles 2 on both sides respectively.

[0075] Specifically, the water stop strip 3 is temporarily fixed at the beam seam 200 , the pressing groove 21 of the profile 2 is cleaned, and then the pressing edges 31 on both sides of the water stop strip 3 are respectively inserted into the pressing grooves 21 of the profile 2 on both sides.

[0076] The water stop strip 3 has upturned ends 32 at both ends along the length direction. The highest end of the upturned end 32 is higher than the pressure edges 31 on both sides to play a waterproof role and prevent the accumulated water in the water stop strip 3 from flowing out from both ends of the water stop strip 3 in the length direction.

[0077] Install the pressure strip 4: press the pressure strip 4 into the pressure groove 21 , adjust so that the pressure strip mounting hole 41 is aligned with the bottom plate mounting hole 214 , and press the pressing edge 31 and the groove wall of the pressure groove 21 tightly through the pressure strip 4 .

[0078] Install the rivet 7: insert the rivet 7 from the bead mounting hole 41 into the base plate mounting hole 214 and the cavity 22, and use a riveting tool to rivet the bead 4 and the profile 2 together.

[0079] The rivet 7 includes a rivet body 71 and a riveting end 711 formed at a distal end of the rivet body 71 .

[0080] The rivet body 71 passes through the pressing strip 4 and the bottom plate mounting hole 214 in sequence, and the riveted end 711 is located in the cavity 22 and riveted to the bottom plate 213 of the pressing groove 22 .

[0081] A plurality of base plate mounting holes 214 are arranged at intervals on the base plate 213, with a hole pitch of 50 mm to 350 mm. A plurality of base plate mounting holes 41 are also arranged on the pressure strip 4 accordingly.

[0082] The bottom plate mounting hole 214 and the pressure strip mounting hole 41 are used for the rivet body 71 to pass through.

[0083] The lower middle portion of the profile 2 defines a cavity 22. During riveting, the cavity 22 provides space for the end of the rivet 7 to expand, forming a riveted end 711. To remove the rivet 7, the rivet body 71 is sheared off at the rivet cap 712, allowing the rivet body 71 to fall into the cavity 22, making removal easier.

[0084] In this embodiment, a closed-type rivet 7 is used to connect and fasten the pressure strip 4 to the connecting base body 31. In the closed-type rivet 7, a mandrel 72 pulls the rivet body 71. The head of the mandrel 72 is located at the end of the rivet body 71. Under the action of tension, the head of the mandrel 72 can pull the end of the rivet body 71 to deform it, thereby forming a riveted end 711 at the end of the rivet body 71.

[0085] like Figure 13 As shown, along the direction of arrow D, the rivet body 71 is passed through the pressure strip mounting hole 41 and the base plate mounting hole 214 in sequence. The end of the rivet body 71 is in the cavity 22, and the tail of the nail core 72 is outside the pressure strip 4. Then use the matching riveting tool to pull the tail of the nail core 72. Figure 13 As shown, the mandrel 72 is pulled in the direction of arrow E, causing the portion of the rivet body 71 in the cavity 22 to deform and expand, and to be riveted to the bottom plate 213 of the pressing groove 21 for fixation. The tail of the mandrel 72 is separated at the reserved breaking point, and the rivet 7 rivets the pressure strip 4 to the bottom plate 213 together, thereby maintaining the pressure edge 31.

[0086] The closed type rivet 7 has a variety of material combinations: aluminum rivet body / steel nail core, aluminum rivet body / stainless steel nail core, aluminum rivet body / aluminum nail core, steel rivet body / steel nail core, stainless steel rivet body / stainless steel nail core, and the rivet material can be selected according to specific needs.

[0087] Therefore, the installation method of the bridge expansion device provided by the present invention presses the pressure edge 31 of the water stop strip 3 into the pressure groove 21 of the profile 2 through the pressure strip 4, and then rivets the pressure strip 4 to the profile 2 through the rivet 7. The structure is stable, easy to install, and can reduce the number of maintenance times.

[0088] In one embodiment, Figure 16-17 As shown, before step S01 , a first supporting steel bar 101 perpendicular to the top surface of the beam body 100 is pre-installed at the end of the beam body 100 .

[0089] Step S02 includes: tying the anchor steel bar 1 to the first support steel bar 101.

[0090] Step S03 includes: pouring concrete higher than the top surface of the beam body 100 .

[0091] Step S04 includes: forming a water retaining platform 103 after the concrete solidifies.

[0092] This embodiment is the installation of a ballastless track bridge expansion device. Figure 16 The water retaining platform 103 does not show the concrete section line.

[0093] The first support bars 101 are pre-installed on the top surface of the beam 100 and are perpendicular to the top surface of the beam 100. If needed, some horizontal bars can be arranged to form a cross-shaped reinforcement frame with the first support bars 101. When temporarily securing the anchor bars 1, the anchor bars 1 are tied to the first support bars 101 using wire or the like. During concrete pouring, the concrete rises above the top surface of the beam 100. After the concrete solidifies, a water retaining platform 103 is formed, which prevents water from entering the waterstop strip 3.

[0094] In one embodiment, Figure 18-19 As shown, before step S01 , mounting grooves 104 are respectively opened at the ends of the two sections of the beam body 100 , and supporting bottom plates 105 are respectively embedded in the mounting grooves 104 of the two sections of the beam body 100 .

[0095] Step S02 also includes: second support steel bars 102 perpendicular to the top surface of the beam body 100 are welded on the support base plates 105 embedded in the two sections of the beam body 100, and positioning tubes 106 perpendicular to the top surface of the beam body 100 are welded on the support base plates 105 embedded in one section of the beam body 100.

[0096] The anchoring steel bar 1 is tied to the second supporting steel bar 102 .

[0097] The first end of the L-shaped connecting steel plate 107 is inserted into the positioning tube 106 , and the second end of the connecting steel plate 107 is higher than the top surface of the beam body 100 and extends toward the beam gap 200 between the two sections of the beam body 100 .

[0098] Step S03 also includes: pouring concrete into the installation grooves 104 of the two beam sections 100.

[0099] It also includes step S08: welding one end of the ballast retaining cover 108 to the second end of the connecting steel plate 107, and the two ends of the ballast retaining cover 108 are respectively covered on the concrete poured in the installation grooves 104 on both sides, and the ballast retaining cover 108 is flush with the top surface of the beam body 100.

[0100] This embodiment is the installation of a bridge expansion device with ballasted track. Figure 18 The concrete hatching is not shown in the mounting groove 104 .

[0101] Before installation, mounting slots 104 are pre-cut at the ends of the two beam sections 100. These slots extend along the width of the beam 100. A metal support base plate 105 is embedded in each slot 104. Secondary support bars 102 are welded to the support base plates 105 in each slot 104. Anchor bars 1 can be temporarily secured to the secondary support bars 102 using wire. If needed, additional horizontal bars can be arranged to form a cross-shaped reinforcement frame with the secondary support bars 102.

[0102] A positioning tube 106 is welded to the supporting base plate 105 on one side, and the positioning tube 106 is a square tube. After installation, the positioning tube 106 extends vertically upward. After connecting the profile 2 to the anchoring steel bar 1, the first end of the L-shaped connecting steel plate 107 is inserted into the positioning tube 106, so that the second end of the connecting steel plate 107 extends toward the beam seam 200 between the two sections of the beam body 100, and the second end of the connecting steel plate 107 is higher than the top surface of the beam body 100. Concrete is then poured into the installation groove 104 to fix the anchoring steel bar 1 and the profile 2. The concrete is basically flush with the top surface of the beam body 100, and a corresponding groove is opened at the position where the ballast cover plate 108 is installed. After the pressure strip 4 is riveted to the profile 2 by rivets 7, the ballast cover plate 108 is welded to the second end of the connecting steel plate 107. Both ends of the ballast retaining plate 108 are placed on the top of the concrete of the mounting grooves 104 on both sides, and the top surface of the ballast retaining plate 108 is substantially flush with the top surface of the beam body 100. The ballast retaining plate 108 covers the top of the water stop 3 to prevent stones from entering the water stop 3.

[0103] In one embodiment, when installing the connecting steel plate 107, a waterproof material is used to seal the gap between the connecting steel plate 107 and the positioning tube 106 to achieve gap sealing. If necessary, a raw tape can be wrapped around the connecting steel plate 107 and then inserted into the positioning tube 106.

[0104] In one embodiment, Figure 1 and Figure 14-15 As shown, the anchoring steel bar 1 includes a steel bar connecting end 11 with an external thread, and a locking nut 12 is connected to the steel bar connecting end 11.

[0105] The profile 2 has a nut mounting hole 24 opening toward the steel bar connection end 11 , and a radially extending limiting groove 241 is provided in the nut mounting hole 24 . A connecting nut 25 is installed in the nut mounting hole 24 , and the connecting nut 25 includes a nut protrusion 251 , which is embedded in the limiting groove 241 .

[0106] Connect the steel bar connection end 11 to the connection nut 25 and tighten the lock nut 12.

[0107] A nut mounting hole 24 is provided in the profile 2, with its opening facing the steel bar connection end 11, for mounting a connection nut 25. The bottom or groove bottom of the nut mounting hole 24 has a radially extending limiting groove 241. The limiting groove 241 is dovetail-shaped.

[0108] The connecting nut 25 is installed in the nut mounting hole 24 and is used to secure the rebar connection end 11. The connecting nut 25 has a nut protrusion 251. During assembly, the nut protrusion 251 engages with the retaining groove 241, securing the connecting nut 25 and preventing it from moving axially along the rebar connection end 11. The locking nut 12 is then used to securely connect the anchor rebar 1 to the profile 2.

[0109] In one embodiment, Figure 8 、 Figure 10 and Figure 14 As shown, the pressing groove 21 has an inner groove wall 211 and an outer groove wall 212 arranged opposite to each other, the inner groove wall 211 is located close to the water stop strip 3, and the inner groove wall 212 extends inwardly and upwardly.

[0110] A receiving groove 23 communicating with the pressing groove 21 is further provided in the profile 2 below the pressing groove 21 . The receiving groove 23 extends vertically downward from the inner groove wall 211 .

[0111] The edge pressing portion 31 includes an edge pressing body portion 311 extending obliquely outward and downward and an edge pressing extension portion 312 extending vertically downward from an end of the edge pressing body portion 311 .

[0112] The edge pressing extension portion 312 is inserted into the receiving groove, and the edge pressing body portion 311 is pressed tightly against the inner groove wall by the pressing strip 4 .

[0113] The groove walls on either side of the groove 21 are divided into an inner groove wall 211 and an outer groove wall 212. The inner groove wall 211 is closer to the beam gap 200 or the water stop strip 3. The outer groove wall 212 extends inward and upward from the bottom plate 213. A receiving groove 23 is also provided at the bottom of the groove 21 in the profile 2. The receiving groove 23 extends vertically downward from the bottom edge of the inner groove wall 211.

[0114] The edge pressing portion 31 includes an edge pressing body portion 311 extending outward and downward in an oblique manner and an edge pressing extension portion 312 extending vertically downward from the end of the edge pressing body portion 311. The edge pressing extension portion 312 is connected to the lower end of the edge pressing body portion 311.

[0115] During installation, the edge pressing extension portion 312 is inserted into the receiving groove, and the edge pressing body portion 311 is pressed against the inner groove wall by the pressure strip 4, thereby improving the stability of the connection.

[0116] In one embodiment, Figure 10 and Figure 14 As shown, when the bead 4 is installed, a sealing strip 5 is installed between the bead 4 and the pressure edge 31 and between the bead 4 and the outer groove wall 212. The sealing strip 5 can be a soft polytetrafluoroethylene sealing strip with high corrosion resistance and aging resistance and good sealing performance.

[0117] Sealing gaskets 5 are arranged on both sides of the pressure strip 4. The sealing gasket 5 on one side contacts the outer groove wall 212, and the sealing gasket 5 on the other side contacts the pressing edge 31, thereby achieving a sealing and waterproofing effect.

[0118] In one embodiment, Figure 1-5 As shown, when installing the water stop strip 3 , two adjacent sections of the water stop strip 3 are clamped in advance by fixing clamps 6 , and the water stop strip 3 is temporarily fixed in the beam seam 200 between the two sections of the beam body 100 .

[0119] After cleaning the pressing groove 21 , the fixing clips 6 are gradually disassembled, and the pressing edge 31 of the water stop strip 3 is inserted into the pressing groove 21 .

[0120] The waterstop strip 3 is composed of multiple sections. The ends of the waterstop strips 3 have upturned ends 32, while the middle waterstop strip 3 does not. The two adjacent sections of the waterstop strip 3 are clamped together by a retaining clip 6, which temporarily secures them in the beam joint 200. After clearing the pressure groove 21 of sand, gravel, and dust, the retaining clips 6 are removed in a sequential order, and the pressure edge 31 of the waterstop strip 3 is inserted into the pressure groove 21.

[0121] In one embodiment, when installing the profile 2, a polytetrafluoroethylene sealing gasket is installed between two adjacent sections of the profile 2 to prevent water leakage in the gap of the profile 2.

[0122] In one embodiment, after the concrete solidifies to a preset degree, waterproof coating is coated on the profile 2 and the concrete respectively to improve the sealing effect.

[0123] In one embodiment, the center line of the water stop strip 3 coincides with the center line of the beam joint 200 between the two sections of the beam body 100, with a deviation of no more than 1.5 mm / m, thereby ensuring the quality of the bridge.

[0124] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0125] The above description is only the principle and preferred embodiment of the present invention. It should be noted that for those skilled in the art, several other variations can be made based on the principle of the present invention, which should also be considered as the scope of protection of the present invention.

Claims

1. A method for installing a bridge expansion device, characterized in that: The bridge expansion device includes an anchoring steel bar, a profile with a pressure groove, a water stop strip with pressure edges on both sides, and a pressure strip for pressing the pressure edges into the pressure groove; wherein the profile has a cavity, the bottom plate of the pressure groove has a bottom plate mounting hole communicating with the cavity, and the pressure strip has a pressure strip mounting hole; The pressure groove has an inner groove wall and an outer groove wall arranged opposite to each other, the inner groove wall is located close to the water stop strip, the inner groove wall extends inwardly and upwardly, and the outer groove wall extends inwardly and upwardly from the bottom plate; A receiving groove is further provided in the profile below the pressing groove and communicates with the pressing groove, and the receiving groove extends vertically downward from the inner groove wall side; The edge pressing portion includes an edge pressing body portion extending outward and downward in an oblique manner and an edge pressing extension portion extending vertically downward from an end portion of the edge pressing body portion; The steps include: S01: pre-connecting the anchor steel bar and the profile into a pre-assembled assembly; S02: Fixing a set of pre-assembled components at the ends of two spaced-apart beam sections, respectively, wherein the anchoring steel bars in each set of the pre-assembled components are fixed to the beam section, and the profiles in each set of the pre-assembled components are close to the beam gap between the two beam sections; S03: Using a protective device to cover the notch of the trough, and pouring concrete to a preset height; S04: After the concrete solidifies to a preset degree, the protective device is removed and the notch of the groove is opened; S05: inserting the pressing edges on both sides of the water stop strip into the pressing grooves of the profiles on both sides respectively, and inserting the pressing edge extensions into the receiving grooves; S06: Pressing the pressure strip into the pressure groove, and aligning the pressure strip mounting hole with the bottom plate mounting hole, pressing the pressure edge against the groove wall of the pressure groove by the pressure strip, and pressing the pressure edge main body against the inner groove wall by the pressure strip; S07: inserting rivets from the molding installation hole into the base plate installation hole and the cavity, and using a riveting tool to rivet the molding and the profile together.

2. The installation method of the bridge expansion device according to claim 1, characterized in that: Before step S01, a first supporting steel bar perpendicular to the top surface of the beam body is pre-installed at the end of the beam body; The step S02 includes: tying the anchor steel bar to the first supporting steel bar; The step S03 includes: pouring concrete higher than the top surface of the beam; The step S04 includes: forming a water retaining platform after the concrete solidifies.

3. The installation method of the bridge expansion device according to claim 1, characterized in that: Before step S01, mounting grooves are respectively opened at the ends of the two sections of the beam, and supporting bottom plates are respectively embedded in the mounting grooves of the two sections of the beam; The step S02 further includes: welding second supporting steel bars perpendicular to the top surface of the beam body on the supporting bottom plates embedded in the two sections of the beam body, respectively; and welding a positioning tube perpendicular to the top surface of the beam body on the supporting bottom plates embedded in one section of the beam body; tying the anchor steel bar to the second supporting steel bar; Inserting the first end of the L-shaped connecting steel plate into the positioning tube, and making the second end of the connecting steel plate higher than the top surface of the beam body and extending toward the beam gap between the two sections of the beam body; The step S03 further includes: pouring concrete into the installation grooves of the two sections of the beam body; It also includes step S08: welding one end of the ballast retaining cover plate to the second end of the connecting steel plate, and the two ends of the ballast retaining cover plate are respectively covered on the concrete poured in the installation grooves on both sides, and the ballast retaining cover plate is flush with the top surface of the beam body.

4. The installation method of the bridge expansion device according to claim 3, characterized in that: When installing the connecting steel plate, a waterproof material is used to seal the gap between the connecting steel plate and the positioning tube.

5. The method for installing a bridge expansion device according to any one of claims 1 to 4, characterized in that: The anchoring steel bar includes a steel bar connecting end with an external thread, and a locking nut is connected to the steel bar connecting end; The profile has a nut mounting hole opening toward the steel bar connection end, the nut mounting hole has a radially extending limiting groove, a connecting nut is mounted in the nut mounting hole, the connecting nut includes a nut protrusion, and the nut protrusion is embedded in the limiting groove; Connect the steel bar connection end to the connection nut and tighten the lock nut.

6. The installation method of the bridge expansion device according to claim 1, characterized in that: When the bead is installed, sealing strips are respectively installed between the bead and the pressing edge and between the bead and the outer groove wall.

7. The method for installing a bridge expansion device according to any one of claims 1 to 4, characterized in that: When installing the water stop strip, two adjacent sections of the water stop strip are clamped in advance by fixing clamps, and the water stop strip is temporarily fixed in the beam gap between the two sections of the beam body; After cleaning the pressing groove, the fixing clamps are gradually disassembled and the pressing edge of the water stop strip is inserted into the pressing groove.

8. The method for installing a bridge expansion device according to any one of claims 1 to 4, characterized in that: When the profile is installed, a polytetrafluoroethylene sealing gasket is installed between two adjacent sections of the profile.

9. The method for installing a bridge expansion device according to any one of claims 1 to 4, characterized in that: After the concrete solidifies to a preset degree, waterproof coatings are coated on the profile and the concrete respectively.

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